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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-76001] Add serverStatus metrics for PeriodicThreadToAbortExpiredTransactions</title>
                <link>https://jira.mongodb.org/browse/SERVER-76001</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This thread is imperative to ensure forward progress of the system. Since we&apos;ve seen multiple hangs where the thread gets stuck, we should add serverStatus metrics which track the number of of transactions killed by the thread. &lt;/p&gt;

&lt;p&gt;Additionally, we should consider &lt;a href=&quot;https://github.com/10gen/mongo/blob/c6e5701933a98b4fe91c2409c212fcce2d3d34f0/src/mongo/db/session/kill_sessions_local.cpp#L73&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;adding a log line&lt;/a&gt; to indicate which session(s) the thread is trying to abort. &lt;/p&gt;</description>
                <environment></environment>
        <key id="2312460">SERVER-76001</key>
            <summary>Add serverStatus metrics for PeriodicThreadToAbortExpiredTransactions</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="haley.connelly@mongodb.com">Haley Connelly</assignee>
                                    <reporter username="haley.connelly@mongodb.com">Haley Connelly</reporter>
                        <labels>
                    </labels>
                <created>Wed, 12 Apr 2023 08:57:22 +0000</created>
                <updated>Sun, 29 Oct 2023 21:23:10 +0000</updated>
                            <resolved>Tue, 4 Jul 2023 09:55:10 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="5540070" author="haley.connelly" created="Mon, 3 Jul 2023 10:09:07 +0000"  >&lt;p&gt;This ticket adds a new serverStatus field&lt;br/&gt;
&quot;metrics.abortExpiredTransactions.passes&quot;&lt;/p&gt;

&lt;p&gt;The &quot;passes&quot; is incremented after a successful pass trying to abort all expired transactions and a given time.&#160;&lt;/p&gt;

&lt;p&gt;If the &quot;passes&quot; stops incrementing for a long duration, either the thread is working to abort many expired transactions or the thread may be &quot;stuck&quot;. See&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-77172&quot; title=&quot;&amp;quot;abortExpiredTransactions&amp;quot; thread can get stuck if it fails to checkout a session&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-77172&quot;&gt;SERVER-77172&lt;/a&gt; for more details on how the thread can get stuck.&#160;&lt;/p&gt;</comment>
                            <comment id="5540062" author="xgen-internal-githook" created="Mon, 3 Jul 2023 10:04:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Haley Connelly&apos;, &apos;email&apos;: &apos;haley.connelly@mongodb.com&apos;, &apos;username&apos;: &apos;haleyConnelly&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-76001&quot; title=&quot;Add serverStatus metrics for PeriodicThreadToAbortExpiredTransactions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-76001&quot;&gt;&lt;del&gt;SERVER-76001&lt;/del&gt;&lt;/a&gt; Add serverStatus metrics for &quot;abortExpiredTransactions&quot; thread&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2c5a74dfd5cfac8e264d9dd24a6761ea4b55f1dc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2c5a74dfd5cfac8e264d9dd24a6761ea4b55f1dc&lt;/a&gt;&lt;/p&gt;</comment>
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                            <customfieldvalue>New serverStatus field:&lt;br/&gt;
&amp;quot;metrics.abortExpiredTransactions.passes&amp;quot;&lt;br/&gt;
&lt;br/&gt;
A &amp;#39;pass&amp;#39; is scheduled periodically, and aborts transactions older than &amp;#39;transactionLifetimeLimitSeconds&amp;#39;. &amp;quot;passes&amp;quot; is incremented after a successful pass. &lt;br/&gt;
&lt;br/&gt;
For Triage: If the metric stops incrementing, the thread could be stuck trying to abort a transaction.</customfieldvalue>

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